"Aperture 3.0 or later is required to install this update." 3.01 won't work

Question

I purchased A3 as a download. I initially begin with the trial, and then I entered the activation key post purchase. A3.0 is on my computer. The program has been very buggy, slow, etc…
Now I want (and need) to download A3.01, which may correct some of these issues. The apple software update module does not recognize the need for 3.01. It did download the 3.01 RAW update, but the main 3.01 download was not offered as an option.
Next I manually downloaded the 3.01 update. However, when I then try to execute this latest update from the dmg file I get the message: "Aperture 3.0 or later is required to install this update."
Well, Aperture 3.0 is on my computer, it is licensed, and it is active. So what more can I say or do?
Some have suggested "renaming" Aperture in the root Applications folder as "Aperture". Well, A3 is already named "Aperture" in my root Applications folder. So this is a nonstarter.
Some have suggested deleting Aperture and reinstalling. Well, I did just that and I still get the same message. Interestingly, the reinstalled A3 started right up without asking me to convert the program to a full-fledged activated program. The activation key must already be lodged somewhere on the computer.
I have also rebooted the program as the last refuge for scoundrels. This also, non-surprisingly, is useless.
What next?

Answer 1

Just a quick note, did you rename or move the Aperture icon to your desktop? I found that Software update has problems finding Aperture if you rename or move the Aperture icon to your desktop. Hope this helps I have a habit of renaming Aperture to the latest version Aperture 3.0.1 and putting the icon on the desktop. Not sure if this is a good idea maybe some of long you Mac users can assist.